diff --git a/db.go b/db.go
index d4c85fb..0ba0e41 100644
--- a/db.go
+++ b/db.go
@@ -244,7 +244,7 @@ func (db *DB) munmap() error {
 }
 
 // mmapSize determines the appropriate size for the mmap given the current size
-// of the database. The minimum size is 4MB and doubles until it reaches 1GB.
+// of the database. The minimum size is 1MB and doubles until it reaches 1GB.
 // Returns an error if the new mmap size is greater than the max allowed.
 func (db *DB) mmapSize(size int) (int, error) {
 	// Double the size from 1MB until 1GB.